Improved Racing

Most check valves block flow even when open. Ours adds virtually no restriction, a flapper design originally developed for military jet engine turbines that swings completely clear of the flow path.

- Ultra-low flow restriction.
- Extremely low cracking pressure.
- Very high holding pressure.
- Robust stainless steel and anodized aluminum construction.
- FKM seals for compatibility with most fluids and operating temperatures up to 392°F (200°C).
- Near-zero leak rate.

Available in -6 and -12 body sizes. Mix-and-match inlet and outlet sizing, we assemble it to your specs.

Configure yours today:
FCV-06: https://www.improvedracing.com/custom-high-flow-check-valve-configurator-06.html

FCV-12: https://www.improvedracing.com/custom-high-flow-check-valve-configurator-12.html

Any Bronco owners in the Orlando area? We're giving away a free oil catch can in exchange for letting us do some test fitting. Looking for 6th gen Broncos (2021+) - 2.3L, 2.7L, or 3.0L.

Message us if you're in!

Fresh tees for fast people. Vintage Black, Ladies Purple Rush and LS Swapped. All available now on our website.

Introducing the CCRZ, our competition oil catch can built for high-horsepower race cars with high-flow recirculated PCV systems.

Available in 0.1L, 0.5L, and 1.0L. Features three inlet ports (2x -12 ORB, 1x -10 ORB) and a massive -16 ORB outlet for near-zero pressure drop. Link in bio.